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引用第20楼anquanbiao于2008-03-03 16:58发表的 :* h4 P* v. @: f
RTI str 这个应该不需要, 应该看RTI (Elec)... UL 1446中要求替代绝缘要考虑电气的和机械的温度指数(见附文), 但是在实际的UL绝缘系统中,则不一定. 比如P LEO(E20050)的B81绝缘系统,是Class B的, 但是包含Dupont的101F这种材料. 这个怎么理解?
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$ d+ m; _! I+ Y# q' O h: b! v8.5.4 An encapsulant, ground, or interwinding insulation whose principal constituents (base resin, filler,
8 j; \2 j' D# e: y4 K$ c( `reinforcement, flame retardant, heat stabilizer, and anti-oxidant) are found, based on documentation, to: a Y/ }5 [; |& E6 S
be identical in composition and proportion to those of an encapsulant, ground, or interwinding insulation
& p2 m- `, a! y9 S, Y" K# z7 gpresently specified in an insulation system shall be accepted in the system without additional tests when
; L2 I3 q8 t: d0 Kboth the following conditions are met:
. U0 H9 Q" p" ^# j' Ka) The assigned relative thermal indices (electrical and mechanical) and minimum thickness of
2 h% k2 C% v' w ?5 r Hthe substitute material are equal to or greater than those of the presently specified material;* S" G( |% f. n e' r0 p
b) The substitute material differs from the presently specified material only with respect to: z3 m( \6 m( u& d
molecular weight, lubricant, nucleating agent, anti-static agent, colorant, or particle size. |
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